Safety appliance for hand-fed power-presses.



F. S. ALIANO. SAFETY APPLIANCE FOR HAND FED POWER PRESSES.

' APPLICATION FILED JUNE 28, 1911. 1,014,359, Patented Jan.9,1912.

" TE sirnrns PATENT 'onmcn.

FnANKs. ALIANO, or NEWYYOBK, N. Y.

SAFETY APPLIANCE FOR HAND-TED POWER-PBESSES.

Specification of Letters Patent.

' ;PatentedJan. 9,1912;

Application filed June 28, 1911. Serial No. 635,761.

To allw/tom it mag concern:

Be it known that I, FRANK S. AL1ANo,'a citizen of the United States, residing in the borough of Brooklyn, in the city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Safety Appliances for Hand-Fed Power-Presses, of which the following is a specification, reference being bad tuated before the two parts of the die are brought together as to not only apprise the operator of the fact that the press'has been tripped, but to actually remove his --hand from beneath the punch so as to preclude any possibility of loss of, or injury to, the

fingers.

A further object is to provide an appliance of this character which will not reduce the-capacity of the press and will not under any circumstances be capable of engaging and holding the hand of the operator with any portion thereof projecting beneath the punch. 1

A still further object is to provide a guard of this character which will serve more or less as a guide over which the work must be fed to the press and which furthermore may be used by the operator to lock the treadle, the mere act of feeding placing the press under the control of the hands of the operator. v

A still further object is to providea guard of this character which will be actuated through the tripping mechanism for the press, andwhereinthe parts may be so set as to actuate the guard prior to the setting ofthe press clutch so as to apprise the operator of the fact that the press has been trippedbeforethe eccentric shaft has been coupled to the flywheel.. f

A still further objectis to provide a guard of this character which may be adjusted as to height toaccommodate it to use with dif- .-fer'ent dies used upon a press. And a furfii'er object is to provide an appliance of this kind which may be applied to the ordinary power press without the necessity for reorganizing any of the operative parts of the press.

My invention consists primarily in a,

safety appliance for hand fed power presses, embodying therein a guard member located between the punch and the operator, and means actuated substantially simultaneously with the tripping of the press whereby said member is ralsed and moved away from the die; and in such other novel features of construction and combination of parts as are hereinafter set forth and described, and more particularly pointedv out in the claims hereto appended.

Referring to the drawings Figure 1 is ,a side elevationofa press. embodying m invention;'Fig. 2 is a frontelevation of my attachment showing parts of the press about same; Fig.3 is a plan view of the attach? ment shown in relation to the lower die;"

Fig. 4 is afdetail' view of a portion of the actuating mechanism.

Like-lettersrefer to like out all of the several views. In the embodiment of my invention shown in the accompanying drawings, a indicates the frame of the press which frame carries the bed-for the die indicated at b, the punch parts throughor ram indicated at 0, the fly-wheel d, the ec-J centric shaft, not shown, and the clutch mechanism adapted to connect said eccentric shaft with said fly-wheel, also not shown.

This mechanism is old and well known in this art and a detailed showing thereof in.

the drawings and a detailed description thereof in the specification is, therefore, not

ven. Mounted upon the side frame of the machine, is' a crank e,fiextending from which are a rod f-by means of which the clutch between the eccentric shaft and the flywheel is actuated, and a second rod 9 connecting said crank with the controlling treadle h; This arrangement is also old and well known in. this art and is described merely because in the preferred form of the invention. said crank is utilized for actuating the safety gu'ard was to cause said guard to beunder-the control' of the trip mechanism and at the sametime permit said trip mechanism to be placed under the control I of the guard if the operator so desires.

Mounted upon opposite sides of the bed 72 are vertically adjustable bearings 71 i in rod 3' has mounted thereon the guard platetween the plate and the shaft may be'used,

arm 6 is transmitted to the crank arm a so "the crank arm 6 to set the clutch mechanism. 30..

' thecr'ank arme'and the rod 7', the amount .ofthis lostfmotion being-sufficient to partion.

.paratus is substantially as follows :-When .to the feeding operation, whic inif'all opera.-

ll/Iounted upon and movable with-the crank The operator then -rdggll esses'fthe ,traadle h,

the eccentric shaft toithe ywheeldbaus;

which is rotatably mounted the shaft "upon a plane which coincides. with that oft e face of the die member carried on said bed; The

It the means of attachment being such 'asto permit said plate to be adjusted laterally, or be set at any desired an l e to"facilitate' tions excepting blanking, must be done over the top surface of said" plate. The plate is is attached to' the rodrj by means-of arms ,m and m having split ends adapted tostraddle the said shaft orrod and be clamped thereon by means of set screws. Any {other de sired adjustable --means of attachment beof attachment being a however, this means skill of the or-,

mere expedient within the dinary mechanic.

Carried by the shaft j-is a crank arm a.

arm'e is a downwardly projected arm 0 and pivotally connected with. the lower end of this arm and with the crank arm a is a link by means of which motion of the crank as to cause the oscillation of the shaft 9' simultaneously with the initial movement of I To cause. movement of the guard plate]? prior to the initial movement of .the clutch mechanism, I provide lost motion between a under the rapidly descending punch, in part to carelessness or a lack of attention to the works. and frequently to the accidental tripping of the clutch mechanism through the treadle. In a machine equipped with the appliance above'described, however, the operator while his hand is still upon the metal part may depress the treadle with impunity vmove the hands from under the punch; or else suflicient power may be applied upon said plate is through the hands to block and prevent the depression of the treadle to an served thatwhile the clutch mechanism'is .operated by the foot of the operator, this mechanism is under the control of the hands of the operator so that if the operator should observe that the part is misplaced in the die he may-arrest the operation of the clutch setting mechanism by means of the hands 1 the die. I however, the operator fails to hands will nevertheless be moved from beneath the punch so that no accident can result from this attempt to correct the misplacin presse the crank arm e is oscillated mentof the rod 1 in setting theclutch.

tially raise the-plate is prior to any move- 'The arrangement of levers described such that the guard plate may become;

The operation of'the herein described apfeeding the press, theoperator'fpasses one 'or both hands containing the part to be operated upon above and" close to the plate is positioning the part properly upon the die.

theclutch m tjauismfthrough the tha e'rj njediatej gscilla- This o eration couples settin rods? and g and. tory' crank .arma ing the rapid reciprocationofthe punch; The rapidity 'of operationiof:jthe. press -r-- sults'in frequent and serious injuriestofthe time being osc oscillatory movement the link 12. The lost motion between the rod f and the crank arm e will permit a sufficient extent to set the clutch. It will-thus be obfor the pur ose of re-adjust-ing thepa-rt in.

as one of two results will follow, the instant the treadle is depressed. Either the'guard plate is will be raised upwardly and toward the operator with sufliclent force to actually so check the clutch setting mechanism, his

of a part. As thetreadle is dethrough the rod 9, the arm 0 at the same llated and transmitting the to the shaft 7' through movement of the arm a, prior to any movementof the rod f and the clutch mechanism carried thereby, to initiate the oscillatory movement of the shaft 9' and raise thegua rd 1 plate is for a'sufiicient distance to touch the hand of the operator and'apprise him of the fact that the clutch mechanism is about to become operative. This. will give the opif he fail to do so, the further oscillation of the plate 70 will forcibly displace his of from projecting under the 'die.- The carried by the bed of the machine and at the serving to lift the-hands out of their posi: tion relative to the die and at 'thesame' time take them without the range of the punch.

the plate 70 form from being brought beneath the punch, thus the press.

hands of the operator due in art to lack of celer'ity -removinig the' and s from- ,platei-k'to adapt it toadies of different thickthis athust nent may beaccomplishcd same time moves toward the operator, time If the operator hold the .treadle depressed; i

will be held elevated, and thusa barrier which wlllprevent the hands erator ample time to remove his hands, but

hands sufficiently to prevent any part there- 4 plate 'k in its oscillation rises above the 'die enforcing-careful andhprop'er operation of are desired to raiseeriaweithe guard by means of the vertically adjustable bearings i i. The plate 70 should be of a width to protect any size of 'die which may be used in a press, and preferably is of a width to prevent any attempt to place the hand thereunder. If it be desired to adjust the guard without adjusting the bearings, the manner of mounting said guard upon the shaft j as shown and described will permit the plate the device will be in connection with power presses.

It is not my intention'to limit the inven-.

tion in its broader aspects tothe precise details ofmonstruction shown in the accompanying drawings,.it being apparent that such may be .modified without departing from the spirit or scope of the invention.

Having described my invention, what vI claim asv new and desire to have-protected by Letters Patent, is

1. A safety appliance for hand fed power presses, embodying therein a guard mally extending across and below the feeding space between the punch and the operator, and means for simultaneously ralsing said guard and moving it toward the operator.

2. A safety appliance for hand fed power presses, embodying therein means ad acent the punch, a punch tripping mechanism, and connections between said means and the tripping mechanism whereby the tripping mechanism may be blocked by the hand of the operator to prevent the operation of the press.

3. A safety appliance for hand fed power presses, embodying therein an oscillatory guard normally extending across andbelow the feeding space and mounted between the punch and the operator, and means oscillating said guard for. simultaneously raising same and moving it toward the operator.

4. A safety appliance for hand fed power presses, embodying therein a guard normally extending across and below the feeding space between the punch and the opera:

tor, means for simultaneously raising said guard and moving it toward the operator, a punch tripping mechanism, and connections between said means and the tripping mechanism whereby said guard will be actuated through said tripping mechanism.

5. A safety 'appliancefor hand fed power presses, embodying therein an oscillatory.

guard'normally extending across and below the feeding space and mounted betweenthe punch and the operator';' means oscillating said guard for simultaneouslyrai'sing same and moving it toward th e operator, a punch tripping mechanism, and connections between sald means and the punch tripping mechanism whereby said guard will be oscil-- lated through said tripping mechanism.

6. A safety appliance for hand fed power presses, embodying therein a guard normally extending across and below the feed- 1 ing space between the punch and the operator, means for simultaneously raising said guard and moving'it toward the operator, a

punch tripping mechanism and connections between said means and the tripping mechanism whereby said guard will be actuated through said tripping mechanism, said connections being so set relative to said punch tripping'mechanism as to cause the actuation of the guard prior to the actuation of the clutch.

7. A safety appliance for hand fed power presses, embodying therein an oscillatory guard mounted between the punch and the operat r, means oscillating said guard for simultaneously raising same and moving it toward the operator, a punch tripping mechanism and connections between said means and the punch tripping mechanism whereby tripping mechanism, said connections being so set relative to said punch tripping mechanism as to cause the actuation of the guard prior to the actuation of the clutch.

8. A safety appliance for hand fed power .presses, embodying therein a guard normally between the punch and the operator,

means whereby the height of saidguard may be adjusted, and means for simultaneously raising said guard and moving it to-- Wardthe operator.

9. A-safety appliance for hand fed power presses, embodying therein an oscillatory shaft mounted between the punch and the' operator, a guard normally extending across and below the feeding space carried by said shaft and normally extending across and below the feeding space andbetween the punch and the operator, a crank upon said shaft, a crank carried by the frame of the machine, connecting means between said last named crank, and the treadle, and between said crank and the controlling clutch, and. connections between said cranks, whereby said shaft will be oscillated for simultaneouslyraising said guard and moving it toward. the operator with the tripping of the I clutch. v

10. A safety appliance for hand fed power presses, embodying therein an oscillatory shaft mounted between the punch and the operator, a guard extending across and below the feeding space carried by said shaft,-

a crank upon said shaft, a crank carried by the frame of the-machine, an arm projecting downwardly and forwardly from 'said last named crank and movable therewith, and a link pivotally connected with said first named crank and said arm whereby said shaft will be oscillated for simultaneously raising said guard and moving it toward the operator with the tripping of the clutch.

1'l. A safety appliance for hand fed power presses, embodying therein an oscillatory shaft mounted between the punch andthe operator, a guard. carried by said shaft, a' crank upon said shaft, a crank carried by the frame of the machine, an arm projecting downwardly and forwardlyfrom said last named crank and movable therewith, and a link pivotally connected with said first named crank and said arm whereby said shaft will be oscillated for simultaneously raising said guard and moving it toward the operator with the tripping of the clutch,

Copies of'this patent may be obtained for said rod connectingthe crank with th'e clutch mechanism affording lost motion between it and the crank whereby 'said shaft will be oscillated prior to the action of the clutch;

12. A safety appliance for hand fed power presses, embodying therein an oscillatory shaft mounted between the punch and [the operator, a guard plate mountedvupon said shaft and projectingtoward the punch, said plate normally'extending across and below the feeding space, and means oscillating said shaft for simultaneously raising saidplate and moving it toward the operator prior to the closing of the die.

.In witness whereof, l. have hereunto" five cents each, by addressing' the Commissioner of Patentfl Washington, D. 0. 

